Finding the Fourth Proportional to 118,916.28, 164,106.69 and 65,198.07

Step by Step Solution

1. Step 1: Write the proportion equation
   118,916.28 : 164,106.69 = 65,198.07 : x
2. Step 2: Convert to fraction form
   118,916.28/164,106.69 = 65,198.07/x
3. Step 3: Cross multiply
   118,916.28x = 164,106.69 × 65,198.07
4. Step 4: Simplify right side
   118,916.28x = 10,699,439,462.09
5. Step 5: Solve for x
   x = 10,699,439,462.09/118,916.28
6. Step 6: Final answer
   x = 89,974.56